\form#0:$c^2 = a^2 + b^2$
\form#1:$c = \sqrt{a^2 + b^2}$
\form#2:$m_1v_1 + m_2v_2 = m_1v_1' + m_2v_2'$
\form#3:$m_1v_1^2 + m_2v_2^2 = m_1v_1'^2 + m_2v_2'^2$
\form#4:$v_1' = (2m_2v_2 + v_1(m_1-m_2))/(m_1+m_2)$
\form#5:$v_2' = (2m_2v_1 + v_2(m_1-m_2))/(m_1+m_2)$
\form#6:$c=\sqrt{a^2+b^2}$
\form#7:$abx^2$
\form#8:$1 * 3 * 4 = 12$
\form#9:$ 0.0 \dots 1.0 $
\form#10:$16 * a$
\form#11:$a$
\form#12:$ A \cdot B = |A| * |B| * cos(\theta) $
\form#13:$ A \cdot B = 1 * 1 * cost(\theta) $
\form#14:$ \theta = acos(A \cdot B) $
\form#15:$ A \cdot B = A_1B_1 + \cdots + A_nB_n $
